Service manual

MERCARB 2 BARREL CARBURETOR
SERVICE MANUAL NUMBER 26
90-861329--1 MARCH 1999 Page 5B-7
Description
This MerCarb carburetor is a two bore carburetor and has a separate fuel feed for each
venturi. This model also is equipped with an electric choke. A removable venturi cluster
(secured to float bowl assembly) has the calibrated main well tubes and pump jets built into
it. The venturi cluster is serviced as a unit. The serviceable main metering jets are bleeds
to properly meter the correct fuel/air mixture to the engine.
Precautions
WARNING
Always disconnect battery cables from battery BEFORE working on fuel system to
prevent fire or explosion.
WARNING
Be careful when cleaning flame arrestor and crankcase ventilation hose; gasoline
is extremely flammable and highly explosive under certain conditions. Be sure that
ignition key is OFF. DO NOT smoke or allow sources of spark or open flame in area
when cleaning flame arrestor and crankcase ventilation hose.
WARNING
Be careful when changing fuel system components; gasoline is extremely flam-
mable and highly explosive under certain conditions. Be sure that ignition key is
OFF. DO NOT smoke or allow sources of spark or flame in the area while changing
fuel filter. Wipe up any spilled fuel immediately.
WARNING
Make sure no fuel leaks exist, before closing engine hatch.
Fuel Supply Connections
CAUTION
DO NOT operate engine without cooling water being supplied to water pickup holes
in gear housing, or water pump impeller will be damaged and subsequent overheat-
ing damage to engine may result.
INDEX